Download 4.1.2 Answer Key

4.1.2 Seeing Growth in Different Representations
Homework
Name ____________________________________________________ Period __________
4-17. Solve each equation below for x. Show all work and check your solution.
a. 7 − 3x = −x + 1
x=3
b. −2 + 3x = −(x + 6)
x = -1
4-18. Leala can write a 500-word essay in an hour. If she writes an essay in 10 minutes,
approximately how many words do you think the essay contains?
About 83 words
4-19. Complete the table below.
a. Explain in words what is done to the input value (x) to produce the output value
(y).
Multiply x by 2 and add 5 to get y
b. Write the rule you described in part (a) with algebraic symbols.
y = 2x + 5
4-20. When Susan’s brother went to college, she and her two sisters evenly divided his
belongings. Among his possessions were 3 posters, 216 books, and 24 CDs. How were
these items divided?
Each sister received 1 poster, 72 books, and 8 CDs
4-21. Kelso’s mom wants to put a floating blanket over the family’s circular wading pool
to keep the heat in and the leaves out. The pool has a diameter of 10 feet.
a. How many square feet of blanket will Kelso’s mother need?
About 78.5ft2
b. If the pool supply store charges $0.10 per square foot for the blanket, how much
will the material for the blanket cost?
$7.85